Counterbalancing means for well-pumping apparatus



June 7 1927. 1,631,408

- C. C. F ETTY GOUNTERBALANCING MEANE; FOR WELL PUMPING APPARATUS Q Filed May 20, 1,926 2 Sheets-Sheet I g N w INVENTO/c June 7 1927.

c. c. FETTY v I OOUNTERBALANCING MEANS-FOR,WELL PUMPING APPARATUS Filed May 20, 1926 2 Sheets$heet INVENTOR (Md/75 17) Char/1 A TTORNE Patented June 1, 1927.

PATENT oFF1cE UNITED STATES cmnnm cannon Furry,- or nnnonano, Kansas.

.comnnnmcmsunms roa WELL-Emma arraa'a'rus.

Appiication filed m 20, 1926. Serialm. 110,581.

' My invention relates to counterbalancing means for Well pumping apparatus and more particularly to means for counterbalancing the action of the weight of the pumping- .means on the band wheel shaft.

It is 'a 'urpose of my invention to rovide a counter alancing weight on the ban wheel shaft for counteracting the action on said shaft of the weight of the pumping means, that is, the pump rods and all the other.ap-

paratus carried 'by the opposite end of, the 1 walking beam to that connected with the band wheel. The weight of the pumping apparatus is exerted at one end'of thewalking beam and this causes 'the' opposite end of the walking beam to haveea normal tendency to move upward, which action is trans ferred to the crank carried by the band wheel shat for actuating the walking beam beam andsaid crank. .This causes an unbalanced condition ofthe band Wheel shaft,.;

the weight of the drilling apparatus acting to retard the rotation of the band wheel through one half-of its movement and act ing to aid the rotation-thereof throu h the other half of its movement. In or er to overcome this unbalancedcondition my improved balancingmeans has been provided an on the band wheel shaft.

My improved balancing means or counterbalancing device comprises a yoke-like arm" that is secured 'to the band wheel'shaft to rotate therewith, which is provided'with a weight at the outer end thereof. -As' the weight-of the pumping apparatus varies due to the variation in the length of the pump 1 rod. and variation in the size of the pump rod means is provided for adjusting for this variation'in weight by, roviding' detach-able counterbalancing weig ts carried by the oke-like' arm. By providing the counteralancin weight on the band wheel shaft the weig t otherwise placed-on'the walking beam for counterbalancing purposes is Other objects and advantages of the invention will appear as the description of the accompanying drawings proceeds. However, I desire to have it distinctly understood that I do not intend to limit myself to the exact details shown or described, but

that I intend to include as part of my in-.v

55, vention all. such obvious changes and modifications of parts as would occur to a per through the pitman connecting the walking avoided, thus preventing, any unnecessary strain onthe walking beam and its support.

weight member with the cap portion thereof separated therefrom.

Fig. 4 is a perspective view of one of the adjusting weights, and

Fig. 5 is a sectional view through the counterweight and the adjusting weight,

showing the inter-engaging ribs and grooves on said members.

.Referringin detail to the drawings: .My improved counterbalancin means is shown as being applied to a wefi pumping apparatus comprisin upon oneend of which is mounted suitable well pumping means 11, the other end of a' walking beam the walking beam having the' itman 12 mounted thereon by means of t e stirrup 13, the opposite end of said pitman being connected with the crank 14 carried by the shaft 15.

Said shaft 15 has the band'wheel 16 keyed thereto so that saidband wheel) and shaft'rotate together, the shaft being driven through the band wheel 16; The

shaft is mounted upon suitable bearing members 17 which are supported upon the sills 18 in an desired manner, the shaft 15. ex-

tending eyond one of the bearing members 17 and carrying on said extension thereof a. counterbalanc-ing, member 19. Said counterbalancing member is provided with a.

shaft engaging portion 20 which is provided with suitable openings in the cap 22 for\ securing said cap thereto by means of the securin members 23. The counterbalancing member 19- is secured to the shaft 15 to rotate therewith, by means of the key 24 engaging said shaft and the cap 22, a set screw 33 holding said key in place..

. The set screw may be released, the screws,- .}23 loosened and the key removed to permit]. the shaft 15 to' turn in-the member 19 "when'removing or.

replacing the pump rod.

The counterbalancing member -19'is fur ther provided with a pair of diverging arms 25 which are connected by means of the cross member 26 at their outer ends, said cross member.26 being made extremely thick and heavy to serve as a counterbalancing weight. Ihe arms 25 and cross member 26 thus form a yoke-like arm having an opening therein within which a suitable adjusting weight is adapted to seat against the flat seat 28 provided 0n the inner face of the transversely extending portion 26, and is provided with ribs 29 which are adapted to engage in the grooves 30 provided on the inner face of one of the arms 25. The detachable weight 27 is moved into position across the face 28 toward the grooves 30 in the arm 25 with theribs .29 in engagement with the grooves. Bolts 3f or other suitable securin members are then engaged with-the openings 32 in the cross piece 26 and openings 34in the weight 27 to hold the weight 27 in position. Any

' number of .such weights 27 may be inserted within the yoke-like arm 19in engagement with the grooves 30, the bolts or securin members 31'being provided of suitable len t for holding the weights 27 on the yoke-like arm.

It will be noted that the yoke-like arm 19 is substantially aligned with the crank 14.

Accordingly the upward pull of the pitman 12 due to the weight of the pumping means will be counteracted by the downward pull of the weight 26 and adjusting weights 27, so that a substantially balanced condition of the shaft 15 will exist, which will provide a substantially smooth rotation of the band wheel 16 due to the fact that the load thereon is substantially the same at all times. 1 What I claim and desire to secure by Letters Patentis 1. In pumping apparatus, a shaft, a band wheel thereon, a crank on said shaft and .a

. counterbalancing member on said shaft, said counterbalancing member comprising a yokec'ounterbalancing member on said shaft, said counterbalancing member comprising a yokelike arm having a shaft engaging portion at one end thereof and a weight at the other end thereof, said yoke-like arm having a seat thereon for receiving adjusting weights and means on said arm engageable by said weights to hold said weights from lateral movement off said arm. V i

3. In pumping apparatus, a shaft, a band wheel thereon, acrank on said shaft. and a eounterbalancing member on said shaft, said counterbalancing member comprising a yokelike arm having a shaft engaging portion at one end thereof, a weight removably located in said yoke-like arm, and means for releas ing said weighted member from said shaft so that said shaft may rotate relative thereto.

t. In pumping apparatus, a shaft, a band wheel on the shaft, a crank on theshaft and a counterbalance on the shaft comprising a weighted member having a seating recess and keyways, and a weight removably seated in said recess and having keys projected into said keyways.

5. wheel on the shaft, a crank on'the shaft and a counterbalance on the shaft comprising a weighted member having a seating recess In pumping apparatuaashaft, a band and keyways, a weight removably seated in said recess and having keys projected into said keyways to retain the weight against lateral displacement, and bolts extending through the weighted member and-weight. In testimony whereof I afi'ix' my signature.

CHARLIE CAMDON FETTY. 

